103 lines
3.3 KiB
JavaScript
103 lines
3.3 KiB
JavaScript
/* -*- Mode: Javascript; indent-tabs-mode:nil; js-indent-level: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/*************************************************************
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*
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* MathJax/extensions/TeX/extpfeil.js
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*
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* Implements additional stretchy arrow macros.
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*
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* ---------------------------------------------------------------------
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*
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* Copyright (c) 2011-2013 The MathJax Consortium
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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MathJax.Extension["TeX/extpfeil"] = {
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version: "2.3"
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};
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MathJax.Hub.Register.StartupHook("TeX Jax Ready",function () {
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var TEX = MathJax.InputJax.TeX,
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TEXDEF = TEX.Definitions;
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//
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// Define the arrows to load the AMSmath extension
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// (since they need its xArrow method)
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//
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TEXDEF.Add({
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macros: {
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xtwoheadrightarrow: ['Extension','AMSmath'],
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xtwoheadleftarrow: ['Extension','AMSmath'],
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xmapsto: ['Extension','AMSmath'],
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xlongequal: ['Extension','AMSmath'],
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xtofrom: ['Extension','AMSmath'],
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Newextarrow: ['Extension','AMSmath']
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}
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},null,true);
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//
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// Redefine the macros when AMSmath is loaded
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//
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MathJax.Hub.Register.StartupHook("TeX AMSmath Ready",function () {
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MathJax.Hub.Insert(TEXDEF,{
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macros: {
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xtwoheadrightarrow: ['xArrow',0x21A0,12,16],
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xtwoheadleftarrow: ['xArrow',0x219E,17,13],
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xmapsto: ['xArrow',0x21A6,6,7],
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xlongequal: ['xArrow',0x003D,7,7],
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xtofrom: ['xArrow',0x21C4,12,12],
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Newextarrow: 'NewExtArrow'
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}
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});
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});
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//
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// Implements \Newextarrow to define a new arrow (not compatible with \newextarrow, but
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// the equivalent for MathJax)
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//
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TEX.Parse.Augment({
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NewExtArrow: function (name) {
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var cs = this.GetArgument(name),
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space = this.GetArgument(name),
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chr = this.GetArgument(name);
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if (!cs.match(/^\\([a-z]+|.)$/i)) {
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TEX.Error(["NewextarrowArg1",
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"First argument to %1 must be a control sequence name",name]);
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}
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if (!space.match(/^(\d+),(\d+)$/)) {
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TEX.Error(
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["NewextarrowArg2",
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"Second argument to %1 must be two integers separated by a comma",
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name]
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);
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}
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if (!chr.match(/^(\d+|0x[0-9A-F]+)$/i)) {
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TEX.Error(
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["NewextarrowArg3",
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"Third argument to %1 must be a unicode character number",
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name]
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);
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}
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cs = cs.substr(1); space = space.split(","); chr = parseInt(chr);
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TEXDEF.macros[cs] = ['xArrow',chr,parseInt(space[0]),parseInt(space[1])];
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}
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});
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MathJax.Hub.Startup.signal.Post("TeX extpfeil Ready");
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});
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MathJax.Ajax.loadComplete("[MathJax]/extensions/TeX/extpfeil.js");
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